Trut frame of a tent

ABSTRACT

The present invention provides a tent frame typically comprised of poles and roof braces, and cross bracing struts located between two adjacent poles, and center bracing struts hinged on between the roof brace and the sliding hub of the pole, wherein each roof brace is supported with a center bracing strut, the top end of the center bracing strut is hinged on the roof brace, and the low end is hinged on the cross bracing strut approaching the sliding hub end. The tent frame is more stable and easy to be folding up.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a tent frame.

2. Description of Prior Art

In accordance with prior art, the conventional structure of foldabletent, as shown in FIG. 1 and FIG. 1A, is typically comprised of fourpoles 1′ and roof cross braces 2′, between two adjacent poles 1′ propernumber of cross bracing struts 3′ 3″ are located, wherein the crossbracing struts 3′, as shown in FIG. 1, can be directly connected to saidadjacent poles 1′ respectively with the both ends by one hinged on astatic hub 7′ located on the tip end of one pole 1′, and another endhinged on sliding hub 5′ fitting on another pole 1′ (as shown in FIG.3), or three pair of cross bracing struts 6′ are set upon, as shown inFIG. 2 (for meeting to the necessary of big scale frame tent); on theother side, a center bracing strut 4′ supporting the roof brace 2′ ishinged on between the roof brace 2′ and the sliding hub 5 with the bothends respectively (cooperating to refer FIG. 3), so that two crossbracing struts 3′ 3″ and the center bracing strut 4′ are hinged on onesliding hub 5′ at side wall and corner individually.

But there are some shortcomings existing in said tent frame as follows:

-   -   1. because said center bracing strut 4′ are in a plane        structured with said roof cross brace 2′ and said pole 1′, so as        pitching or folding up, said center bracing strut 4′ just only        exerts supporting effect in this plane, but not generate side        supporting force to the roof brace 2′, hence the whole unfolded        frame is not stable as expected, especially to the large size        tent, this problem is more obviously, due to the more load        exerting on the center bracing strut 4′ via the roof brace 2′,        the single pressure in this plane often makes the center bracing        strut 4′ swing so as to be unstable.    -   2. concerning to the folding-up process, the user just exerts        all force on the cross bracing struts 3′ 3″ so that the sliding        hub 5′ is indirectly pushed down along the pole 1′, but due to        the center bracing strut 4′ hinged on said sliding hub 5′, the        moved sliding hub 5′ has to bring the center bracing strut 4′ to        draw the roof brace 2′ to fold in this process, so the sliding        hub 5′ should be bore exact resistance force coming from the        center bracing strut 4′, for this sake, the sliding hub 5′ has        to be made of high-strength material, so that the production        cost is gone up, on the other hand, even so, the folding force        exerting on the roof brace 2′ is not so big that the roof brace        2′ is folded smoothly.

OBJECTS AND SUMMARY OF THE INVENTION

It is therefore a main object of the present invention to provide astable tent frame that can be pitched up and folded up easily andsmoothly.

For achieving the above-mentioned object, the present invention providesa tent frame that is typically comprised of poles and roof braces, andcross bracing struts located between two adjacent poles, and centerbracing struts hinged on between the roof brace and the sliding hub ofthe pole, in which each roof brace is supported with a center bracingstrut, the top end of the center bracing strut is hinged on the roofbrace, and the low end is hinged on the cross bracing strut approachingthe sliding hub end.

Wherein, two center bracing struts are arranged on two opposite sides ofthe diagonal line of the frame, the both top ends of them are hinged onthe roof brace, and the low ends of them are respectively hinged on thetwo cross bracing struts approaching the sliding hub ends.

Said cross bracing strut is attached with a tip bearing for pivoting thelow end of the center bracing strut on.

The low end of the center bracing strut can be hinged on the side wallof the sliding hub beyond the pivoting point of the low end of the crossbracing strut on.

As utilizing above-mentioned project, because the low end of thecoordinated center bracing strut is hinged on the cross bracing strut,the center bracing strut is not located in the plane structured by theroof brace and the pole, so that when pitching or folding up, the centerbracing strut not only generates support force in the plane structuredby the roof brace and the pole, but also exerts side support force tothe roof brace so as to keep the roof brace stable without any swingingas in unfolding state, especially to large size of frame tent thesupport is more stability.

On the other hand, as folding up, the cross bracing strut can directlydraw the center bracing strut bending to the inward, but not via thesliding hub, so the sliding hub bears less force, meanwhile exert moreforce on the roof brace so as to facilitate to fold up more easily. Andthe requirement of the material of the sliding hub is relativelyreduced, and the production cost is gone down too.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a scheme of the prior art.

FIG. 2 is a scheme of another prior art.

FIG. 3 is an enlarged view showing the structure of the sliding hub ofthe prior art.

FIG. 4 is a scheme of the present invention.

FIG. 5 is an enlarged view showing the hinging method of the center andcross bracing struts of the present invention.

FIG. 6 is an enlarged view showing another hinging method of the centerand cross bracing struts of the present invention.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

Referring to FIG. 4, a frame tent provided by the present invention istypically comprised of poles 1 and roof braces 2, cross bracing struts 3located between two adjacent poles 1, and center bracing struts 4 hingedon between the roof brace 2 and the sliding hub 5 of the pole, in whichthe cross bracing struts 3, as shown in FIG. 1, can be directlyconnected to said adjacent poles 1 respectively with the both ends byone hinged on a static hub 7 located on the tip end of one pole 1, andanother end hinged on sliding hub 5 fitting on another pole 1 (as shownin FIG. 3, FIG. 5 and FIG. 6), or three pair of cross bracing struts 6are set upon, as shown in FIG. 2 and FIG. 4 (for meeting to thenecessary of big scale frame tent); on the other side, the centerbracing strut 4 is hinged on the roof brace 2 with the top end.

Wherein each roof brace 2 is supported with a center bracing strut 4,the low end of the center strut 4 is hinged on the cross bracing strut 3approaching the sliding hub end.

Referring to FIG. 4, crossing the diagonal line of the frame, the twocenter bracing struts 4 are hinged on the roof brace 2 with the topends, but the low ends of them are tilted to opposite side of thediagonal line, and hinged on the coordinated cross bracing strutrespectively approaching to the sliding hub 5 end, so that the twocenter bracing struts 4 support the roof brace 2 from the both sidescrossing the diagonal line of the frame to make the frame rigidifywithout swinging as pitching up.

For making the hinging connection more smoothly, the cross bracing strut3, as shown in FIG. 5, is attached with a tip bearing 8 for pivoting thelow end of the center bracing strut 4 on; also referring to FIG. 6, thelow end of the center bracing strut 4 can be hinged on the sliding hub 5pivoting end of the cross bracing strut 3; or directly hinged on theside wall of the sliding hub 5 (not shown in drawing).

So, as folding up, the cross bracing strut 3 can directly draw thecenter bracing strut 4 bending to the inward, but not via the slidinghub 5, so the sliding hub 5 bears less load, meanwhile exert biggerforce on the roof brace 2 so as to facilitate to fold up more easily.

1. A tent frame typically comprised of poles and roof braces, and crossbracing struts located between two adjacent poles, and center bracingstruts hinged on between the roof brace and the sliding hub of the pole,wherein each roof brace is supported with a center bracing strut, thetop end of the center bracing strut is hinged on the roof brace, and thelow end is hinged on the cross bracing strut approaching the sliding hubend.
 2. A tent frame as claimed in claim 1, wherein crossing thediagonal line of the frame, the two center bracing struts are hinged onthe roof brace with the top ends, but the low ends of them are tilted toopposite side of the diagonal line, and hinged on the coordinated crossbracing strut respectively approaching to the sliding hub end.
 3. A tentframe as claimed in claim 1, wherein said cross bracing strut isattached with a tip bearing for pivoting the low end of the centerbracing strut on.
 4. A tent frame as claimed in claim 1, wherein the lowend of the center bracing strut can be hinged on the side wall of thesliding hub beyond the pivoting point of the low end of the crossbracing strut on.